package nodeList;

import java.util.List;

/**
 * @author gaolainan
 */
public class CombineTwoSortedList
{
    public static void main(String[] args)
    {

    }

    public ListNode combine(ListNode l1, ListNode l2){
        ListNode node = new ListNode(0);
        ListNode pHead = node;
        while(l1 != null && l2 != null){
            if (l1.val > l2.val){
                pHead.next = l2;
                l2 = l2.next;
            }else {
                pHead.next = l1;
                l1 = l1.next;
            }
            pHead = pHead.next;
        }
        if (l1 == null){
            pHead.next = l2;
        }
        if (l2 == null){
            pHead.next = l1;
        }
        return node.next;
    }

    public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
        ListNode node = new ListNode(0);
        ListNode cur = node;
        while(l1 != null && l2 != null){
            if(l1.val <= l2.val){
                cur.next = l1;
                l1 = l1.next;
            }
            else{
                cur.next = l2;
                l2 = l2.next;
            }
            cur = cur.next;

        }
        if (l1 == null){
            cur.next = l2;
        }
        if(l2 == null){
            cur.next = l1;
        }
        return node.next;
    }
}
